<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');

/**
 * Trim Slashes
 *
 * Removes any leading/trailing slashes from a string:
 *
 * /this/that/theother/
 *
 * becomes:
 *
 * this/that/theother
 *
 * @access	public
 * @param	string
 * @return	string
 */
if ( ! function_exists('trim_slashes'))
{
    function trim_slashes($str)
    {
        return trim($str, '/');
    }
}

// ------------------------------------------------------------------------

/**
 * Strip Slashes
 *
 * Removes slashes contained in a string or in an array
 *
 * @access	public
 * @param	mixed	string or array
 * @return	mixed	string or array
 */
if ( ! function_exists('strip_slashes'))
{
    function strip_slashes($str)
    {
        if (is_array($str))
        {
            foreach ($str as $key => $val)
            {
                $str[$key] = strip_slashes($val);
            }
        }
        else
        {
            $str = stripslashes($str);
        }

        return $str;
    }
}

// ------------------------------------------------------------------------

/**
 * Strip Quotes
 *
 * Removes single and double quotes from a string
 *
 * @access	public
 * @param	string
 * @return	string
 */
if ( ! function_exists('strip_quotes'))
{
    function strip_quotes($str)
    {
        return str_replace(array('"', "'"), '', $str);
    }
}

// ------------------------------------------------------------------------

/**
 * Quotes to Entities
 *
 * Converts single and double quotes to entities
 *
 * @access	public
 * @param	string
 * @return	string
 */
if ( ! function_exists('quotes_to_entities'))
{
    function quotes_to_entities($str)
    {
        return str_replace(array("\'","\"","'",'"'), array("&#39;","&quot;","&#39;","&quot;"), $str);
    }
}

// ------------------------------------------------------------------------

// ------------------------------------------------------------------------

/**
 * Strictly parse and output a user submited value
 *
 * Converts special charaters to entities
 *
 * @access  public
 * @param string
 * @return  string
 */
if ( ! function_exists('output_string_protected'))
{
    function output_string_protected($str)
    {
        return htmlspecialchars(trim($str));
    }
}

// ------------------------------------------------------------------------

/**
 * Reduce Double Slashes
 *
 * Converts double slashes in a string to a single slash,
 * except those found in http://
 *
 * http://www.some-site.com//index.php
 *
 * becomes:
 *
 * http://www.some-site.com/index.php
 *
 * @access	public
 * @param	string
 * @return	string
 */
if ( ! function_exists('reduce_double_slashes'))
{
    function reduce_double_slashes($str)
    {
        return preg_replace("#(^|[^:])//+#", "\\1/", $str);
    }
}

// ------------------------------------------------------------------------

/**
 * Reduce Multiples
 *
 * Reduces multiple instances of a particular character.  Example:
 *
 * Fred, Bill,, Joe, Jimmy
 *
 * becomes:
 *
 * Fred, Bill, Joe, Jimmy
 *
 * @access	public
 * @param	string
 * @param	string	the character you wish to reduce
 * @param	bool	TRUE/FALSE - whether to trim the character from the beginning/end
 * @return	string
 */
if ( ! function_exists('reduce_multiples'))
{
    function reduce_multiples($str, $character = ',', $trim = FALSE)
    {
        $str = preg_replace('#'.preg_quote($character, '#').'{2,}#', $character, $str);

        if ($trim === TRUE)
        {
            $str = trim($str, $character);
        }

        return $str;
    }
}

// ------------------------------------------------------------------------

/**
 * Create a Random String
 *
 * Useful for generating passwords or hashes.
 *
 * @access	public
 * @param	string	type of random string.  basic, alpha, alunum, numeric, nozero, unique, md5, encrypt and sha1
 * @param	integer	number of characters
 * @return	string
 */
if ( ! function_exists('random_string'))
{
    function random_string($type = 'alnum', $len = 8)
    {
        switch($type)
        {
            case 'basic'	: return mt_rand();
            break;
            case 'alnum'	:
            case 'numeric'	:
            case 'nozero'	:
            case 'alpha'	:

                switch ($type)
                {
                    case 'alpha'	:	$pool = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
                    break;
                    case 'alnum'	:	$pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
                    break;
                    case 'numeric'	:	$pool = '0123456789';
                    break;
                    case 'nozero'	:	$pool = '123456789';
                    break;
                }

                $str = '';
                for ($i=0; $i < $len; $i++)
                {
                    $str .= substr($pool, mt_rand(0, strlen($pool) -1), 1);
                }
                return $str;
                break;
            case 'unique'	:
            case 'md5'		:

                return md5(uniqid(mt_rand()));
                break;
            case 'encrypt'	:
            case 'sha1'	:

                $CI =& get_instance();
                $CI->load->helper('security');

                return do_hash(uniqid(mt_rand(), TRUE), 'sha1');
                break;
        }
    }
}

// ------------------------------------------------------------------------

/**
 * Alternator
 *
 * Allows strings to be alternated.  See docs...
 *
 * @access	public
 * @param	string (as many parameters as needed)
 * @return	string
 */
if ( ! function_exists('alternator'))
{
    function alternator()
    {
        static $i;

        if (func_num_args() == 0)
        {
            $i = 0;
            return '';
        }
        $args = func_get_args();
        return $args[($i++ % count($args))];
    }
}

// ------------------------------------------------------------------------

/**
 * Repeater function
 *
 * @access	public
 * @param	string
 * @param	integer	number of repeats
 * @return	string
 */
if ( ! function_exists('repeater'))
{
    function repeater($data, $num = 1)
    {
        return (($num > 0) ? str_repeat($data, $num) : '');
    }
}


/* End of file string_helper.php */
/* Location: ./system/helpers/string_helper.php */